In this guide, the team of authors attempted to present modern views on the main nosological forms in the treatment of which endocrine surgeons are involved. The content of the chapters is based on the extensive experience of leading specialized centers for each nosology, on the one hand, on the other, on existing practical recommendations adopted as a result of the consensus of the world's leading experts of professional associations on each problem, based on the principles of evidence-based medicine. Intended for endocrinologists, cardiologists, surgeons, morphologists, laboratory and functional diagnostics specialists, etc.